Masses and masses of room to spare. Tracktor Beam is about 1.5Mb compressed. I actually killed the music because it made the compressed file eight times the size, and I wasn't convinced by the track. I'm still looking for music if anyone has any good ideas.

even at its largest, Outnumbered with 6MB of music and a 1.3MB (universal) binary never broke 11MB. By compressing the music better and stripping the executable I was able to get the size down even further (it's now 7MB total).

So, 10MB would have felt a little tight, but would have worked out OK. 20MB was no restriction at all.

The issue was just converting it to the ogg format? Check out this page, then: http://www.vorbis.com/software/#macosx . I thought you were having trouble playing an ogg from within BlitzMax, my mistake.